Corrugator



Jan. 9, 1934. s. M. LANGSTON 1,943,080

CORRUGATOR Filed April 21, 1933 INVENTOR Jamae/Mfiarzymiom BY ATTORN EYS Patented Jan. 9, 1934 UNITED STATES PATENT OFFICE 'IClaims.

sagging away too much from the periphery of the second corrugating roller, it is customary to provide guide members positioned close to the periphery of the second corrugating roller as shown in the Sieg Patent No. 1,835,816. The paper does not always sag to any great extent, and under certain conditions may adhere closely to the second corrugating roller.

The adhesive applying roller is juxtaposed to the second corrugating roller, and is provided with a series of circumferential grooves through which or into which said guide members extend, at or adjacent to the line of tangency of these two rollers.

In order to insure the contact of the corrugated sheet with the adhesive applying roller, and the transfer of adhesive to the crowns of the corrugations, it has been necessary to position the adhesive applying roller very close to said second corrugating roller.

In operation, and particularly at high speed, adhesive enters the circumferential grooves of the adhesive applying roller and causes this adhesive o be projected from said grooves to form beads on the surface of said roller adjacent to opposite edges of each of the grooves.

The corrugated sheet is usually of less width than the length of the set of corrugating rollers. For instance, the width of the paper run on the machine may vary from 24 inches up to the full width of the machine, which may be 74 inches or wider. Also the machine often continues running after the end of the paper is reached. Under either of these conditions, the beads of adhesive formed on the surface of this adhesive applying roller may be of such size that they will be directly transferred to the exposed portions of the second corrugating roller.

It is very important that no adhesive come in contact with the corrugating surfaces of the corrugating rollers, since this adhesive hardens thereon and interferes with proper meshing of the corrugating rollers necessitating frequent shutting down and cleaning.

One object of the present invention is to remedy this condition, and to prevent adhesive from being transferred to the second corrugating roller.

Another object is to provide means for pressing the corrugated paper into contact with the adhesive applying roller to insure a better transfer of adhesive to said paper, and to insure contact of the latter roller with the entire width of the paper.

I accomplish this result by providing the second corrugating roller with one or more circumferential grooves, in each of which is disposed a guide member which pushes or guides the corrugated paper away from the corrugating surface of the corrugating roller, and into contact with the adhesive applying rollerh By means of this arrangement, the adhesive applying roller may be disposed at a greater distance from the second corrugating roller, so that the beads of adhesive built up or formed thereon will not be transferred to the second corrugating roller. Also, by pressing the' corrugated paper against the adhesive applying roller, the contact of said latter roller with the entire width of said paper is assured.

In the accompanying drawing, I have illustrated one embodiment of the present invention in a single figure showing a vertical longitudinal section through a portion -of the corrugating machine.

The present invention is illustrated as forming a part of a machine designed for the manufacture of corrugated paper, and of the general type shown in the patents above referred to. In this machine, a sheet 10 to be corrugated, is caused to pass between a pair of intermeshing corrugating rollers 11 and 12, each having the periphery thereof provided with longitudinally extending grooves and teeth or ridges.

After the sheet 10 hasbeen corrugated between the two rollers 11 and 12, adhesive is applied to the crowns of the corrugations of the sheet by means of an adhesive applying roller 13. This may receive the adhesive in any suitable manner, as for instance from a pick-up roller 14, the lower portion of which is immersed in a pan 15 containing silicate of soda or other suitable adhesive.

A liner or surface sheet 16 is pressed against the adhesive coated crowns of the corrugated sheet by means of a smooth-surfaced pressure roller 18. The resultant single-faced corrugated paper 17 passes out from between the rollers 12 and 18.

Means are provided for stripping the sheet from engagement with the roller 11 as said sheet passes beyond the intermeshing portions of the two corrugating rollers 11 and 12, and for guiding the corrugated sheet and preventing it from sagging too far from the second corrugating roller 12 during the travel of said sheet from the corrugating roller 11 to the adhesive applying roller 13 and from said latter roller to the pressure roller 18. This means is shown as comprising a series of transversely curved guide members or fingers 20 adjacent to the periphery of the second corrugating roller 12 between the rollers 11 and 18. These fingers may be supported in any suitable manner as for instance on brackets 24 connected to a bar .25; The end portions 21 may extend to or beyond the line of tangency of the pitch circles of the corrugating rollers 11 and 12 to insure proper stripping action. The corrugating roller 11 is provided with a series of circumferential grooves 22 to receive the ends of these guide fingers, and the adhesive applying roller 13 is similarly provided with circumferential grooves 23 to receive the intermediate portions of said guide members 20.

The construction so far described may be similar to those shown in one or more of the aforesaid patents, or may be of any suitable form adapted for the purpose.

As an important feature of the present invention, means are provided for positively guiding the corrugated sheet away from the corrugating surface of the second corrugating roller 12, and for pressing it against the adhesive applying roller 13. For that purpose, the corrugating roller 12 is provided with a series of circumferential grooves 27 in each of which a guide member 28 is disposed adjacent to the adhesive applying roller 13. The outer surface of said guide member where the latter passes between the two corrugating rollers, is spaced inwardly from the bottoms of the corrugations in the roller 12 so as not to interfere with the corrugating action, but the portion facing the applying roller 13 extends outwardly beyond the bases of the grooves of the roller 12, so that as the paper travels between the roller 12 and the roller 13, it is guided away from the periphery of the roller 12 and into contact with said applying roller.

The guide members 28 are advantageously formed with the inner curved surfaces thereof substantially corresponding with the curvature of the bases of the grooves 27, so that said inner surfaces will be disposed adjacent to but spaced from the base curves, and extend substantially parallel thereto. The width of each guide member 28 advantageously varies so that it gradually increases as it approaches the applying roller 13.

The roller 13 is placed a suflicient distance away from the second corrugating roller 12 to prevent adhesive from being transferred to the exposed corrugating surface of said latter roller, but not so far that the paper is moved entirely out of the corrugations of the roller 12.

The guide members 28 are advantageously in the form of fingers transversely curved and extending a substantial distance in the grooves 27. These members are advantageously supported from a bar 31, placed above the two rollers 11 and 12 and parallel thereto. Each guide member 28 has connected thereto a bracket 32 provided with a slot for engaging the bar 31, and having a tapped hole 34 for receiving a bolt or screw by means of which said bracket may be secured to the bar 31. The guide members 20 and the guide members 28 are on opposite sides of the paper, and have substantially parallel surfaces forming a g'uideway or path for the corrugated paper. The supporting bars 25 and 31 are on opposite sides of the line of tangency of the corrugating rollers, and both are in such a position that their respective guides may be readily removed or adjusted.

In the forms illustrated, one roller of the adhesive applying mechanism serves as a pickup roller and the other as a transfer roller, and the spacing of the two controls the thickness of the layer of adhesive carried by the transfer roller to the paper. Obviously, the pick-up roller may also serve directly as the applying roller, and the other roller may serve solely to regulate the thickness of the layer of adhesive without either delivering to the paper or picking up adhesive from the pan.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:-

1; A machine for making corrugated paper, including a corrugating roller, an adhesive applying roller adjacent thereto but spaced therefrom for applying adhesive to the crowns of said paper, said corrugating roller being provided with one or more circumferential grooves, and guide members in said grooves for guiding said corrugated paper away from the corrugated surface of said corrugating roller and in contact with said adhesive applying roller.

2. A machine for making corrugated paper, including a roller having longitudinal corrugations and a circumferential groove, an adhesive applying roller spaced from said first mentioned roller, and having a circumferential groove, and a pair of guide members, one in one groove and the other in the other groove, and having spaced substantially parallel surfaces for guiding the pager into contact with the adhesive applying ro er.

3. A machine for making corrugated paper, including a pair of intermeshing corrugating rollers between which the paper is corrugated, one of said corrugating rollers being peripherally grooved, guide members for holding a corrugated sheet adjacent to the periphery of said latter corrugating roller, a peripherally grooved adhesive applying roller adjacent to but spaced from said latter corrugating roller for applying adhesive to the crowns of said sheet, said guide members passing between said adhesive applying roller and said last mentioned corrugating roller in the grooves of said applying roller, and guide fingers in the grooves of said last mentioned corrugating roller, passing between said applying roller and said last mentioned corrugating roller, and extending adjacent to the intermeshing regions of the two corrugating rollers.

4. A machine for making corrugated paper, including a pair of intermeshing corrugating rollers between which the paper is corrugated, one of said corrugating rollers being peripherally grooved, a peripherally grooved adhesive applying roller adjacent to but spaced from said latter corrugating roller for applying adhesive to the crowns of said paper, and curved guide members in the grooves of said last mentioned corrugating roller, passing between said applying roller and said 145 last mentioned roller, and extending adjacent to the intermeshing regions of the two corrugating rollers for guiding corrugated paper away from the corrugating surface of said latter corrugating roller, and in contact with said adhesive applying 150 roller, the portions of the outer cln'ved surfaces of said guide members adjacent to said interimeshing regions of said corrugating rollers being nearer to the axis of the peripherally grooved corrugating roller than are the portions passing between said applying roller and said peripherally grooved corrugating roller.

5. A machine for making corrugated paper, including a pair of intermeshing corrugating rollers between which the paper is corrugated, one of said corrugating rollers having a circumferential groove, an adhesive applying roller adjacent to but spaced from said latter corrugating roller for applying adhesive to the crowns of said paper, and having a circumferential groove, and a pair of guide memberaone in one groove and the other in the other groove, passing between said applying roller and said last mentioned corrugating roller, and extending adjacent to the intermeshing regions of the two corrugating rollers, said guide members having spaced substantially parallel curved surfaces for guiding the paper into contact with the adhesive apply-i ing roller, and the guide member in the groove of said corrugating roller having the portion of the outer curved surface thereof adjacent to the intermeshing regions of said corrugating rollers nearer to the axis of the grooved corrugating roller than the portion between the grooved corrugating. roller and said applying roller.

6. A machine for making corrugated paper, including a roller having longitudinal corrugations and a circumferential groove, an adhesive applying roller spaced from said last mentioned roller, and having a circumferential groove, a pairof supporting members extending longitudinally on opposite sides of the path of travel of the paper, and a pair of guide members, one in one groove and the other in the other groove, connected respectively to said supporting members, and forming therebetween a passageway for guiding the paper into contact with the adhesive applying roller. 1

7. A machine for making corrugated paper, including a pair of intermeshing corrugating rollers between which the paper is corrugated, one of said corrugating rollers being peripherally grooved, an adhesive applying roller adjacent to but spaced from said latter corrugating roller for applying adhesive to the crowns of said pa-- per, and curved guide members in the grooves of said last mentioned corrugating roller, passing between said applying roller and said last mentioned corrugating roller, and extending adjacent to the intermeshing regions of the two corrugating rollers for guiding corrugated paper away from the corrugating surface of the grooved corrugating roller, and in contact with said adhesive.

applying roller, the outer curved surfaces of said guide members near the intermeshing portions of said corrugating rollers being spaced radially inwardly from the bottoms of the corrugations of said grooved corrugating roller, and extending radially outwardly beyond the bottoms of said corrugations but not beyond the crowns of said corrugations at the region adjacent to the adhesive applying roller.

SAMUEL M. LANGSTON. 

